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Hubble Space Telescope
Data Handbook Errata for Cycle 17

TOMULTISPEC work around for COS Data

The IRAF task TOMULTISPEC does not work on COS x1d files. While this problem is being resolved, please use the following work around:

In the pyraf command line type the following three commands:

tprint input_x1d.fits showrow- showhdr- row=1 column="wavelength,flux" > tprint_output.txt

rspec tprint_output.txt rspec_output.fits

splot rspec_output.fits

TPRINT takes the x1d fits file as an input and outputs a text file. RSPEC takes the text file output by TPRINT as an input and outputs a fits file. Set the RSPEC parameter dtype to nonlinear so that SPLOT will plot wavelengths instead of pixel numbers.